Continuous tide calculation method based on wind power fluctuation rule

Abstract

The invention discloses a continuous tide calculation method based on a wind power fluctuation rule. The continuous tide calculation method comprises the following steps of: analyzing an active power fluctuation characteristic of a wind power field by adopting an analytical method in the poisson process, and constructing a probability model; determining a time interval of wind power outlet fluctuation and the output variation situation of the power of the wind power field according to the probability model and a statistical result of the wind power variation, thus obtaining the fluctuation rule of the wind power output; performing continuous tide calculation within the same time interval according to the fluctuation rule, thus obtaining a state variable value; and analyzing the state variable value, analyzing the influence of access of large-scale wind photoelectricity on the tide, thus obtaining the influence of wind power on the tide. According to the continuous tide calculation method based on the wind power fluctuation rule, advantages of wind power fluctuation compatibility and high calculation speed are realized; and due to application of actual power grid data, the correctness and the practicability are proved.

Description

technical field [0001] The invention relates to the technical field of grid-connected wind power, in particular to a continuous power flow calculation method based on wind power fluctuation rules. Background technique [0002] In recent years, with the adjustment of my country's energy structure, green energy has been paid more and more attention. Wind and wind power is a renewable green energy. At the same time, due to the randomness and intermittent nature of wind and wind power, which cannot be dispatched, new requirements are put forward for the power flow calculation including wind turbines. [0003] The common methods of power flow calculation including wind turbines mainly include: [0004] (1) Consider the wind turbine access point as a PQ node (the active power P and reactive power Q of the PQ node are given, and the node voltage V and phase δ are the quantities to be sought), that is, according to the given wind speed and power factor, calculate the wind power Th...

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Problems solved by technology

[0004] (1) Consider the wind turbine access point as a PQ node (the active power P and reactive power Q of the PQ node are given, and the node voltage V and phase δ are the quantities to be sought), that is, according to the given wind speed and power factor, calculate the wind power The active power and reactive power of the unit; but this method does not fully consider the real-time changes in the reactive power of the fan;

[0005] (2) The wind farm adopts the RX model, which fully considers the output power characteristics of the wind turbine and is more perfect than other models; however, the iterative process in the model needs to be divided into two steps: conventional power flow iterative calculation and asynchronous wind turbine slip iteration Calculation, the total number of iterations is large, and the convergence speed is slow

[0007] In the process of realizing the present invention, the inventors found that at least there are defects in the prior art that do not fully consider the fluctuation of wind power and the slow calculation speed.

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